TNMHTTP and Windows XP/2000

Hi,
I used TNMHTTP to download a file from my site using Get method to retrieve
the file.
In Windows 9x it works fine, but for Windows 2000 and Windows XP it starts
downloading and stops without errors, but the file is not complete
downloaded.

Is there any special specification for W2000 and XP  ?.

Thanks
Donis.